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Biology 102 exam 2

Terms in this set (38)

What is the host of the coronavirus
Bats
scientic method
a series of logical steps to follow in order to solve problems: observe, hypothesis, test hypothesis, theory, test theory
Can you prove/ disprove a hypothesis
Hypothesis can never be proven just can get enough material to assume its accurate
What is a scientific theory?
a well-tested concept that explains a wide range of observations
controlled experiment
experiment in which only one variable is changed
confirmation bias
a tendency to search for information that supports our preconceptions and to ignore or distort contradictory evidence
double blind experiment
Takes away bias from the tester and those being tested
Blind trial experiment
Takes away the testers bias
Amino acids
are not only made by living things, can be made in a lab but also found in meteors and planets
Where do we think life came from
another planet based on the left and right amino acids,
Amino acids on earth
Left
hydrothermal vents
spots on the ocean floor where hot gases and minerals escape from earth's interior into the water, most likely suffer
Early atmosphere vs now
No oxygen was needed this was cause by cyanobacteria
cyanobacteria
Bacteria that can carry out photosynthesis creating oxygen
could new life be forming itself now
No new life, because oxygen damages tissue
First life form on earth
Bacteria
Prokaryote
unicellular organism that lacks a nucleus: bacteria and archaea- no nucleus
aerobe
oxygen- air
anaerobe
no air- without oxygen
obligate
to have to do
facultative
flexible
what are humans
Obligate aerobes
autotroph
An organism that makes its own sugar
heterotroph
An organism that cannot make its own food. relies on autotroph
Endosymbiosis
"living inside another"
primary endosymbiosis
evolution of an organelle from bacteria that entered a host cell and lived inside it. (mitochondria)
secondary endosymbiosis
plants ate a bacteria which became their chloroplast
Phylogeny
measures genetic relatedness, looks at evolution
molecular clock
gene that mutates regularly, we inherit it. can not be used with bacteria
Bacteria plasma
piece of DNA that a bacteria has that can be shared with one another to save them in certain situations
How do bacteria get new DNA
they can get infected by a virus so they can pick up DNA and give it to another
Analogous traits
Bothe have the same feature or ability but did not get it from the same ancestry. came from convergent evolution
Homologous treats
both have similar features that we inherited from the same ancestors
what is the agent of the coronavirus
VIRUS
How is the virus spread
air borne
What is the RO number for coronavirus
greater than will be an epidemic
Why do scientist predict the 2% fatality rate is possible an overestimation of the real rate of the coronavirus?
sickest people are the only ones being tested
What is the environment of the virus
stable in body and air
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